The invention discloses an energy-saving brush for increasing a soap utilization rate. The energy-saving brush comprises a body, wherein a soaking box is fixed on the upper plane of a brush head of the body; an upper cover for sealing the soaking box is arranged on the soaking box; a plurality of through holes in corresponding positions are formed in the plane of the brush head of the body and the bottom surface of the soaking box; after the soaking box is fixedly connected with the body, the through holes in the soaking box and the plane of the brush head of the body are communicated up and down; the soaking box is connected with the upper cover through an adjusting device; a sealing device is arranged inside the soaking box; and after the sealing device is connected with the adjusting device, connection and disconnection of the through holes with the soaking box are achieved through the adjusting device. As the soaking box is arranged on the upper plane of the brush head of the body of the energy-saving brush, small pieces of soap are used after being soaked in water in the soaking box, the upper box and the soaking box are connected in a sealed manner through the adjusting device, soap water does not flow out from the upper end of the soaking box when the energy-saving brush is used, the soap utilization rate is high, the energy is saved, the environment is protected, the waste of soap is reduced, very high use values are achieved, and convenience of popularization and application is brought.